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  2. Enzyme - Wikipedia

    en.wikipedia.org/wiki/Enzyme

    Etymology and history Eduard Buchner By the late 17th and early 18th centuries, the digestion of meat by stomach secretions and the conversion of starch to sugars by plant extracts and saliva were known but the mechanisms by which these occurred had not been identified. French chemist Anselme Payen was the first to discover an enzyme, diastase, in 1833. A few decades later, when studying the ...

  3. Democracy - Wikipedia

    en.wikipedia.org/wiki/Democracy

    The word comes from dêmos '(common) people' and krátos 'force/might'. Under Cleisthenes, what is generally held as the first example of a type of democracy in 508–507 BC was established in Athens. Cleisthenes is referred to as "the father of Athenian democracy".

  4. Dyspnea (Shortness of breath): Causes, Symptoms, and ... - WebMD

    www.webmd.com/lung/shortness-breath-dyspnea

    Dyspnea, or shortness of breath, can be caused by various factors and can be a symptom of an underlying medical condition. Learn more about the causes, symptoms, and treatment options for dyspnea ...

  5. Most U.S. Adults Will Have Heart Problems By 2050: Report. By 2050, more than 6 in 10 U.S. adults will have heart disease, according to a new projection by the American Heart Association.

  6. Word problem (mathematics education) - Wikipedia

    en.wikipedia.org/wiki/Word_problem_(mathematics...

    Word problem from the Līlāvatī (12th century), with its English translation and solution. In science education, a word problem is a mathematical exercise (such as in a textbook, worksheet, or exam) where significant background information on the problem is presented in ordinary language rather than in mathematical notation.

  7. Best Exercises for a Shoulder Labral Tear - WebMD

    www.webmd.com/a-to-z-guides/best-exercises...

    Wall Stretches. Stand facing a wall, six inches away. Lean forward with your hands above your head and rest your arms against the wall. Gently lean your body forward, crawl your hands up the wall ...

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